32
SECTION 3, continued
Table 1 Operating Features and Functional Descriptions
Item Name Description
1ENTER
Used in Calibration Mode to select the value of the Formazin calibration standard and to initiate
measurement of the standard. Pressing ENTER during measurement with Signal Averaging on
clears the buffer of all previous data. Selects functions during instrument setup and Flow-Cell setup.
Selects an edited sample number. Initiates zeroing in the Color Unit mode. Initiates zeroing
measurement in the %T and Absorbance modes.
2 Down Arrow Same as the up arrow except for direction of steps.
3 Right Arrow
Advances the cursor position during calibration standard editing, instrument setup and sample
number selection. Also, used to ignore dilution water turbidity during calibration (if required).
4 Up Arrow
Edits LED digits in the calibration mode and steps through calibration standards 00 through 05
(in the mode display). Edits the “SETUP” number (in the mode display) during the instrument setup
procedure. Increments the sample number (in the mode display).
5SAMPLE
Initiates editing of the sample number shown in the Mode display (green LED).
Annunciator lights to indicate Sample mode is selected.
6 Display Eight-digit LED display.
7
Mode Display
(green 2-digit LED)
Displays calibration standard number, setup parameter number or sample number.
Pressing the up or down arrow key increments or decrements the sample number by one during
measurement mode. The sample number is included on the time- and date-stamped measurement
printout.(ThesamplenumberalsoiseditedbypressingtheSAMPLE key.)
8 Lamp
Lighted annunciator indicates when the instrument lamp is on.
Flashes to indicate a low-level light condition.
9
CAL?
Lights to indicate the calibration information recorded during the calibration process is outside of the
acceptable range (may be an operator calibration error or an instrument malfunction).
The instrument must be recalibrated if the CAL? annunciator flashes.
10 RANGE
Selects Auto Ranging or Manual Ranging.
Pressing RANGE steps the instrument through the range options.
11 Manual Range Lighted annunciator indicates when the instrument is in the manual ranging mode.
12 Auto Range Lighted annunciator indicates when the instrument is in the automatic ranging mode.
13 UNITS Exit
Selects unit of measure. Available options are NTU, EBC, NEPH, %T, Absorbance, CU and two ASC
(Application Specific) units. Also, exits calibration or setup without saving new values.
14 RATIO
Turns ratioing on or off [only in NTU, EBC, NEPHLO, or ASC modes with <40 NTU (or equivalent)
samples]. Lighted annunciator indicates ratioing is on.
Flashes to indicate over-range of 40 NTU in ratio off mode.
15 FLOW
Enters or exits automated flow mode used with the automated Flow-Cell system.
Lighted annunciator indicates that the flow mode of operation is on.
A flashing annunciator indicates that the flow cycle is complete.
16 PRINT
Transmits the result of measurement to a computer or printer. If the instrument is in the calibration
review mode, pressing PRINT transmits calibration data to a printer or computer. If the PRINT key is
held during power up, a full set of diagnostic results is transmitted to a computer or printer.
Pressing the print key while editing a setup number prints a summary of the setup commands.
17 LINE FEED Advances the internal printer paper one line each time the key is pressed.
18 SIGNAL AVG
Turns the signal averaging function on or off.
Lighted annunciator indicates Signal Averaging mode is on.
19 CAL Zero
Initiates calibration in NTU, EBC, NEPH and ASC measurement modes. Initiates analytical zeroing in
CU (Color Units) calibration and operational modes.
Initializes analytical zeroing in %Transmittance and Absorbance modes.
20 SETUP
Initiates editing of the setup number to configure the instrument for specific operational functions
(e.g., keyboard beeper on or off, print interval, date and time, Signal Averaging, etc.).
21
Power Cord
Receptacle
Connection for line power cord. Must be correct rating for line voltage used.
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